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Thornton, Colorado, USA
UpdatedTue, 27-Jul-2021 12:35pm MDT 
 

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Thundersnow makes a surprise appearance

Wednesday, March 31st, 2021 11:02am MDT

Anyone else hear or see this last night? A lone storm cell popped up near DIA and put on a nice little show (we had graupel at Thornton Weather HQ). Thank you to Jessica Fey Photography for sending us this. Just awesome stuff!

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Thornton closes out March with clear skies, cool temperatures

Wednesday, March 31st, 2021 5:00am MDT

After what has been a cold, wet month, we wrap it up today with calm, dry conditions. Mercury readings will be on the cool side but mark the beginning of a nice warm up.

Sunny skies start us off and will be with us throughout today and tonight. Nary a cloud will be seen. Highs will top out right around the 50 degree mark. Overall conditions will be calm and dry.

Tonight, skies remain clear with overnight lows in the mid-20s.

Looking ahead, temperatures are going to continue to warm tomorrow and through the weekend. By Sunday, highs will be approaching close to the 80 degree mark.

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Snow early Tuesday then Thornton will dry out, remain chilly

Tuesday, March 30th, 2021 5:14am MDT

We are waking up to a light blanket of white today but that the snow won’t amount to much. It will be coming to an end later this morning and we will remain cold.

The day starts out with cloudy skies and light snow. The snow will be coming to an end by mid-morning and then the cloud cover will begin to break up a little bit. Additional accumulations will be minimal. High temperatures today will top out around the 40 degree mark.

Tonight, skies will be partly to mostly clear with overnight lows in the low to mid-20s.

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Monday to offer up mild temperatures but with a healthy dose of wind

Monday, March 29th, 2021 5:32am MDT

A bit of good and bad for Thornton’s weather today. While we will enjoy our warmest temperatures in weeks, we also will be subject to a good bit of wind.

The day starts off with sunny to mostly sunny skies and we will see similar throughout the daytime hours, a few more clouds in the PM. High temperatures today will climb to the low 70s. As for those winds, they will be gaining speed this morning and by early afternoon, gusts to 40mph or so will be possible.

Tonight, the wind will persist for much of the nighttime period but decreasing in speed. Overnight lows will drop to the low to mid-20s. A cold front arrives by late evening and with it we will have a chance for snow. Accumulations overnight, if any, will be light.

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March 28 to April 3: This week in Denver weather history

Sunday, March 28th, 2021 4:48am MDT

This Week in Denver Weather History

Looking at historical weather records can oftentimes provide insight into what weather we can expect over a given period of time.  As we saw this past week, while the calendar says spring, Old Man Winter can return very quickly.  Our look at this week in Denver weather history we see much of the same – major snowstorms and blizzards that impact travel and knock out power to residents.  Also, these spring snowstorms are often moisture-laden and their sheer weight can be damaging.

27-28

In 1951…heavy snowfall totaled 6.5 inches at Stapleton Airport where north winds gusted to 38 mph on the 27th and 41 mph on the 28th.

In 1972…heavy snowfall of 6.2 inches was measured at Stapleton International Airport…where northeast winds gusted to only 21 mph.

In 1980…a major blizzard struck the northeastern Colorado plains…closing both I-70 and I-76 to the east of Denver for a time.  Some areas received 1 to 2 feet of snow.  Drifts were 4 to 8 feet high.  The storm killed many young livestock.  At Stapleton International Airport…snowfall totaled 6.7 inches from the storm and north winds gusted to 29 mph.

In 2002…high winds developed in the foothills west of metro Denver.  Winds gusted to 81 mph near Fritz Peak…72 mph at Rollinsville…and 70 mph at Blackhawk.  West winds gusted to 51 mph on the 27th and to 45 mph on the 28th at Denver International Airport where the temperature warmed to a high of 69 degrees on the 28th.

27-29

In 1948…high winds raked Boulder.  A wind gust to 75 mph was recorded at Valmont.  Sustained winds in excess of 35 mph were estimated in Boulder.  Minor damage was reported.

In 1961…heavy snowfall totaled 9.5 inches at Stapleton Airport over the 3 day period.  Most of the snow…5.3 inches…fell on the 28th.  Winds were generally light and gusted to only 22 mph from the north.

28

In 1886…the lowest recorded temperature in March…11 degrees below zero…occurred.

In 1911…a thunderstorm produced snowfall of 0.4 inch…which was the only measurable snowfall of the month…making the month the second least snowiest March on record.

In 1962…a vigorous cold front produced strong winds across eastern Colorado.  North winds gusted to 46 mph at Stapleton Airport where visibility was briefly reduced to 3/4 mile in blowing dust.  A construction worker was injured in Aurora when he was struck by a windblown piece of plywood.

28-29

In 1891…rain changed to snow and totaled 9.7 inches in the city.  Northeast winds were sustained to 12 mph with gusts to 28 mph on the 28th.

In 1910…a strong cold front brought much wind…rain…and snow to the city.  Rain on the 28th changed to snow early on the 29th.  Snowfall totaled only 2.8 inches…but north winds were sustained to 50 mph on the 29th. Precipitation from the storm totaled 0.96 inch.

In 1994…moist upslope winds combined with an upper level system to dump 5 to 7 inches of snow along the eastern foothills and across metro Denver.  Snowfall totaled 6.3 inches at Stapleton International Airport where northeast winds gusted to 39 mph.  Thirteen inches of new snow were measured at the Eldora Ski Area west of Boulder.

28-30

In 1949…a major winter storm dumped 11.3 inches of snow over downtown Denver.  Snowfall totaled 10.4 inches at Stapleton Airport.  North to northeast winds were sustained to 17 mph.

In 1985…a slow moving snow storm moved across the state. Denver received only 4.0 inches of snowfall with amounts in the foothills totaling 1 to 2 feet.  Still…this was enough snow in Denver to cause flight delays of up to 6 hours at Stapleton International Airport on the night of the 29th. East winds gusted to 28 mph on the 28th.

29

In 1887…west winds sustained to 44 mph warmed the temperature to a high of 62 degrees.

In 1921…post-frontal northeast winds were sustained to 46 mph with gusts to 52 mph.

In 1925…southeast winds were sustained to 46 mph with gusts to 48 mph.  These were the strongest winds of the month that year.  The winds warmed the temperature to a high of 72 degrees.

In 1934…a construction worker was killed by lightning as he walked with a shovel on his shoulder along Cherry Creek in the city.  The thunderstorm produced light rain.

In 1967…a southwest wind gust to 52 mph was recorded at Stapleton International Airport.  The warm Chinook winds warmed the temperature to 79 degrees equaling the record for the date.

In 1979…a tornado touched down 4 miles southwest of Parker… But caused no reported damage.

In 1998…four children attending a birthday party in Denver were injured when an apparent dry microburst produced a sudden strong wind gust which blew an inflatable playhouse they were occupying into a neighbor’s yard.  The playhouse scraped the roof of the host’s two-story house…then landed in the adjoining yard.  The children were treated for minor head injuries and cuts.

29-30

In 1938…overnight heavy snowfall was 6.3 inches over downtown Denver.

In 1982…strong winds buffeted metro Denver…breaking windows and damaging roofs.  Wind gusts to 90 mph were recorded in Boulder and 51 mph at Stapleton Airport.  The strong winds flattened a condominium under construction in Lakewood.

In 1991…1 to 6 inches of snow fell across metro Denver with the heaviest snow confined to the foothills.  Six inches of snow was recorded at South Platte in the foothills southwest of Denver and 3 inches at Castle Rock.  Snowfall totaled only 0.7 inch at Stapleton International Airport where northeast winds gusted to 33 mph on the 29th.

29-31

In 1970…snowfall totaled 6.0 inches at Stapleton International Airport.  Heavy snow accumulation in Boulder on the 29th caused the collapse of a carport at an apartment building…damaging 11 automobiles.  Northeast winds gusted to 24 mph at Stapleton International Airport.

30

In 1895…rain changed to sleet…then snow…and totaled 8.0 inches in downtown Denver.  Strong post-frontal northeast winds were sustained to 48 mph with gusts to 61 mph. Temperatures hovered around 30 degrees all day.

In 1968…microburst winds associated with virga and brief light rain gusted to 46 mph at Stapleton International Airport.

In 1983…winds gusted to 82 mph at the National Center for Atmospheric Research in Boulder with peak gusts of 70 to 80 mph in the foothills.  Minor damage occurred at a construction site and to some homes in Boulder.  West winds gusted to 39 mph at Stapleton International Airport.

» Click here to read the rest of March 28 to April 3: This week in Denver weather history

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Thornton’s weekend starts out cool and unsettled, then finally warms up

Friday, March 26th, 2021 4:54am MDT

A bit of a mixed bag of weather for us. Our third weak storm system of the week impacts us today but then we start to see things dry out and Sunday brings some real warmth.

For today, the passing system is not very strong so its effects will be limited. Mostly cloudy skies will be above with highs in the upper 40s. Light rain / sprinkles will be possible throughout the daytime hours. Early this AM and then this evening there may be some snow mixed in but no accumulations. Tonight, any showers will end by midnight and skies will be partly to mostly cloudy. Overnight lows will be in the mid to upper 20s.

Saturday finally sees things dry out but we will remain on the cool side. Highs will be in the lower 50s under mostly sunny skies. Saturday night, mostly clear skies will be above with overnight lows around 30 degrees.

Sunday finally sees us experience a bit of a warm up. Highs will be in the low to mid-60s under sunny skies. Overall conditions will be calm and warm.

Have a great weekend!

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Cool temperatures for Thornton’s Thursday, chance for late PM showers

Thursday, March 25th, 2021 5:10am MDT

The day today starts out relatively nice with chilly temps but a good dose of sun. Later today though a weak system will increase the clouds and bring a chance for showers.

Mostly sunny skies start us off then after about 10:00am, cloud cover will increase leading to mostly cloudy skies by late afternoon. Highs today will top out right around the 50 degree mark.

Late afternoon, after about 5:00, we may see a sprinkle of rain. Then, overnight, some light snow may fall. No accumulations are expected but if there are some, they will be minimal. Overnight lows tonight will be below freezing.

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Thornton’s Wednesday continues the unsettled weather conditions, chilly temperatures

Wednesday, March 24th, 2021 5:10am MDT

A little bit of a surprise in the amount of snow overnight as we received 2.1 inches (as of 4:00am). Today, some additional light snow is possible but little, if any, accumulation is expected.

Cloudy skies start us off and, like yesterday, we may see the sun make of a bit of an appearance late in the day. Light snow / flurries will be possible throughout the day, especially this morning, but little / no accumulation is expected.

Any showers will wrap up by the early evening and we will be left with partly cloudy skies overnight. Lows tonight will drop to the low 20s.

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Chilly temperatures, some light snow late in the day for Tuesday

Tuesday, March 23rd, 2021 4:58am MDT

Another day of unsettled weather for Thornton. A weak system will keep mercury readings well below normal and we may see a dusting of snow later in the day and tonight.

Mostly cloudy skies start us off and will be the general rule throughout the day. High temperatures will top out in the low to mid-40s. Conditions will initially be calm but then breezy, north winds will kick in this afternoon. The afternoon also brings with it a few snow flurries although they are not expected to amount to much.

This evening, chances for snow increase and will continue overnight. However, minimal, if any, accumulation is expected. Skies will remain mostly cloudy tonight and lows will drop to the upper 20s.

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Light snow early Monday to come to an end, some sun by end of the day

Monday, March 22nd, 2021 5:06am MDT

Our latest weather maker is wrapping up right now. As of 4:00am Thornton had received 3.6 inches of heavy, wet snow and we will see additional, light accumulations this morning.

The day starts off with cloudy skies and light snow. Mid-afternoon will see that cloud cover start to break and the sun peek out. Highs today will top out around the 40 degree mark.

Additional accumulations of less than an inch will be seen between now and noon. A few, lingering showers of snow / rain may be seen in the early afternoon. A Winter Weather Advisory does remain in effect until noon.

Tonight, skies will be partly cloudy with overnight lows in the low to mid-20s.

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